The effective focal length f of a camera is the distance required for the lens to converge light to a single focal point. The angle of view α of a camera describes the angular range (either horizontally, vertically, or diagonally) that is imaged by a camera. a. Show that α = 2 arctan d 2 f where d is the dimension of the image sensor or film. b. A typical 35 -mm camera has image dimensions of 24 mm (vertically) by 36 mm (horizontally). If the focal length is 50 mm , find the vertical and horizontal viewing angles. Round to the nearest tenth of a degree.
The effective focal length f of a camera is the distance required for the lens to converge light to a single focal point. The angle of view α of a camera describes the angular range (either horizontally, vertically, or diagonally) that is imaged by a camera. a. Show that α = 2 arctan d 2 f where d is the dimension of the image sensor or film. b. A typical 35 -mm camera has image dimensions of 24 mm (vertically) by 36 mm (horizontally). If the focal length is 50 mm , find the vertical and horizontal viewing angles. Round to the nearest tenth of a degree.
The effective focal length
f
of a camera is the distance required for the lens to converge light to a single focal point. The angle of view
α
of a camera describes the angular range (either horizontally, vertically, or diagonally) that is imaged by a camera.
a. Show that
α
=
2
arctan
d
2
f
where
d
is the dimension of the image sensor or film.
b. A typical
35
-mm
camera has image dimensions of
24
mm
(vertically) by
36
mm
(horizontally). If the focal length is
50
mm
, find the vertical and horizontal viewing angles. Round to the nearest tenth of a degree.
rmine the immediate settlement for points A and B shown in
figure below knowing that Aq,-200kN/m², E-20000kN/m², u=0.5, Depth
of foundation (DF-0), thickness of layer below footing (H)=20m.
4m
B
2m
2m
A
2m
+
2m
4m
sy = f(x)
+
+
+
+
+
+
+
+
+
X
3
4
5
7
8
9
The function of shown in the figure is continuous on the closed interval [0, 9] and differentiable on the open
interval (0, 9). Which of the following points satisfies conclusions of both the Intermediate Value Theorem
and the Mean Value Theorem for f on the closed interval [0, 9] ?
(A
A
B
B
C
D
=
Q6 What will be the allowable bearing capacity of sand having p = 37° and ydry
19 kN/m³ for (i) 1.5 m strip foundation (ii) 1.5 m x 1.5 m square footing and
(iii)1.5m x 2m rectangular footing. The footings are placed at a depth of 1.5 m
below ground level. Assume F, = 2.5. Use Terzaghi's equations.
0
Ne
Na
Ny
35 57.8 41.4 42.4
40 95.7 81.3 100.4
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